2000-OSM, F1 2-11
Checking Total Column Flow
To check column flow using a 10-port sample valve and an 8-port selector valve, perform the
following steps (other valve configurations use similar procedures):
1. Turn all valves off as described in the previous paragraph.
2. See Figure 2-6. To check total column flow, set Valves One and Two to ON.
3. Connect the flow-measuring device to the CELL VENT of the detector cell and measure the flow
rate. The total column flow should be as specified in the Data Package. s If necessary, adjust the
COLUMN PRESSURE regulator to obtain the specified flow rate.
1
1
2
2
3
3
4
4
55
6
6
7
7
8
8
9
9
10 10
CARRIER
IN
COLUMN
PRESSURE
ADJ
PI
SAMPLE
VENT
AIR OUT
AIR IN
VALVE “ON”
AIR OUT
AIR IN
VALVE “ON”
SAMPLE
IN
ANALYTICAL
FLOW ADJ
SAMPLE
LOOP
BACKFLUSH
VENT
COLUMN
2
COLUMN
3
COLUMN 1
DETECTOR
SELECTOR
FLOW ADJ
SELECTOR
VENT
CELL
VENT
Figure 2-6. CHECKING TOTAL COLUMN FLOW
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